protected override void UpdateLayout()
{
base.UpdateLayout();
if (_backgroundCanvas.IsValueCreated)
{
BackgroundCanvas.Geometry = Control.Geometry;
}
if (_clipper.IsValueCreated)
{
ClipperCanvas.Geometry = Control.Geometry;
ClipperCanvas.Invalidate();
}
}
protected virtual void OnLayout(object sender, Native.LayoutEventArgs e)
{
RealControl.Geometry = Control.Geometry;
if (_backgroundCanvas.IsValueCreated)
{
BackgroundCanvas.Geometry = Control.Geometry;
}
if (_clipper.IsValueCreated)
{
ClipperCanvas.Geometry = Control.Geometry;
ClipperCanvas.Invalidate();
}
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (Control != null)
{
Control.LayoutUpdated -= OnLayout;
}
if (_backgroundCanvas.IsValueCreated)
{
BackgroundCanvas.PaintSurface -= OnBackgroundPaint;
BackgroundCanvas.Unrealize();
_backgroundCanvas = null;
}
if (_clipper.IsValueCreated)
{
ClipperCanvas.PaintSurface -= OnClipperPaint;
ClipperCanvas.Unrealize();
_clipper = null;
}
}
base.Dispose(disposing);
}
